Improvement in materials for bearings and journals



tliniuhi %tdw taunt tffim ELIZA DEXTER MURFEY, OF NEW YORK, N. Y., ASSIGNOR TO THE MAN- HATTAN PAOKENG MANUFACTURING COMPANY, OF SAME PLACE.

Letters Patent No. 109,239, dated November 15, 1870.

The Schedule referred to in these Letters Patent and making part of the same.

Nature and Object of the n-vei'ztion.

My invention consists of a bearing for journals, 800., and in a process for manufacturing the same, all being too fully described hereafter to need. preliminary explanation.

General Description.

. Hemp, cotton, fur, or other fibrous material is formed into a loose lap by means of a carding-machine, by partially felting the fibers, or by any other suitable means.

The lap of loosely-aggregated fibers is drawn in a horizontal position against and betweenupright pins, which divide the lap into narrow slivers, and each of the latter is passed through a heated tube to a twisting-machine, by which it is converted into yarn.

As the sheet of'fibers approaches the dividing-pins, and before the slivers are twisted, a bearing material, as powdered plumbago, soapstone, &c., is, sifted'onto the sheet, and becomes intimately mixed with the fibers, with which it is effectually combined when the fibers are twisted into a rope.

Par-affine, holding rubber in solution, tallow, or other suitable material, maybe discharged with the powdered substances upon the sheet, or the slivers may be drawn through the liquid after being impregnated with the powder, the subsequent twisting in the heated tubes expelling all the paraffine except a gummy residunm, which serves to prevent theescape of powder from the strands when the rope is handled, and also increases the efiiciency of the bearing.

After the yarns have been thoroughly impregnated with bearing-material, they a're'woven together in a loom, or plaited, or interlocked, or connected in any manner whereby a flat sheet or mat may be produced.

'lhe'said mat, when inserted in an axle or journalbox so as to bear uniformly on the journal, will in a short time acquire a surface, upon which the journal will turn with but little friction and without. unusual heating. The bearing is more durable than those of soft metal, is cheaper, and may be effectually employed without the use of other lubricants than those used in impregnating the fibers.

The chief advantage'of the bearing, however, arises from the fibers .of the impregnated strands composing the mat being so firmly united that the bearing will not become disintegrated and crumble away whensubjected to the excessive pressure imparted by heavy shafts or axles.

\Vithout confining myself to the process described of impregnating the strands, or to the use of any special impregnating material,

I Claim- 1. A bearing for journals, &c., consisting of impregnated yarn plaited, woven, interlocked, or otherwise connected together, so as to form a sheet or mat, as described.

2. The process of impregnating the strands by mtroducing the impregnating materials among fibers formed into a lap, and then twisting the latter into a yarn. v r

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

ELIZA D. MURFEY.

W'itnesses THOMAS PRUDEN, HENRY MoMAuns. 

